if a missile is fired from a tank it gets a momentum of 2000 kg metre per second if the velocity of the Missile 50 metre per second what will be its mass

40kg

Explanation:

Given parameters:

Momentum of the missile  = 2000kgm/s

Velocity of the missile  = 50m/s

Unknown:

Mass of the missile  = ?

Solution:

Momentum of a body is the amount of motion a body posses. It is mathematically defined as the product of mass and velocity;

     Momentum  = mass x velocity

The unknown is mass, insert the given parameters and solve for it;

     2000 = mass x 50

       mass =   = 40kg

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.